Polymerase chain reaction (PCR) and rapid (antigen) tests for COVID-19 both involve taking a swab. Results for a PCR test take longer, as it needs to go to a laboratory. It is more costly but tends to ...

Add Yahoo as a preferred source to see more of our stories on Google. (Photo: golero via Getty Images) For many of us, the 2021 holiday season hasn’t gone quite like we’d hoped on the COVID front. Yes ...

NEW YORK -- Millions of Americans have purchased rapid COVID-19 tests online or at local stores and signed up to receive test kits through a free government program. Unlike conventional, lab-processed ...

Rapid antimicrobial susceptibility testing for gram-negative blood infections shows no improvement in clinical outcomes ...

COVID-19 at-home rapid testing is in high demand nationwide, as schools, businesses and travel open up with fewer and fewer restrictions. If you're searching for fast results, rapid tests let you know ...

California, Connecticut and New York are among the states sending millions of rapid antigen tests to schools and families ahead of January reopening. Washington, D.C. and Baltimore schools are ...